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    <h5>RegExp class</h5>
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      <div><h1><span class="kind-constructor">RegExp</span> constructor</h1></div>

    <section class="multi-line-signature">
      
      <span class="name ">RegExp</span>(<wbr><span class="parameter" id="-param-source"><span class="type-annotation"><a href="dart-core/String-class.html">String</a></span> <span class="parameter-name">source</span>, {</span> <span class="parameter" id="-param-multiLine"><span class="type-annotation"><a href="dart-core/bool-class.html">bool</a></span> <span class="parameter-name">multiLine</span>: <span class="default-value">false</span>, </span> <span class="parameter" id="-param-caseSensitive"><span class="type-annotation"><a href="dart-core/bool-class.html">bool</a></span> <span class="parameter-name">caseSensitive</span>: <span class="default-value">true</span>, </span> <span class="parameter" id="-param-unicode"><span>@Since(&quot;2.4&quot;)</span> <span class="type-annotation"><a href="dart-core/bool-class.html">bool</a></span> <span class="parameter-name">unicode</span>: <span class="default-value">false</span>, </span> <span class="parameter" id="-param-dotAll"><span>@Since(&quot;2.4&quot;)</span> <span class="type-annotation"><a href="dart-core/bool-class.html">bool</a></span> <span class="parameter-name">dotAll</span>: <span class="default-value">false</span></span> })
    </section>

    <section class="desc markdown">
      <p>Constructs a regular expression.</p>
<p>Throws a <a href="dart-core/FormatException-class.html">FormatException</a> if <code>source</code> is not valid regular
expression syntax.</p>
<p>If <code>multiLine</code> is enabled, then <code>^</code> and <code>$</code> will match the beginning and
end of a <em>line</em>, in addition to matching beginning and end of input,
respectively.</p>
<p>If <code>caseSensitive</code> is disabled, then case is ignored.</p>
<p>If <code>unicode</code> is enabled, then the pattern is treated as a Unicode
pattern as described by the ECMAScript standard.</p>
<p>If <code>dotAll</code> is enabled, then the <code>.</code> pattern will match <em>all</em> characters,
including line terminators.</p>
<p>Example:</p>
<pre class="language-dart"><code class="language-dart">var wordPattern = RegExp(r"(\w+)");
var bracketedNumberValue = RegExp("$key: \\[\\d+\\]");
</code></pre>
<p>Notice the use of a <em>raw string</em> in the first example, and a regular
string in the second. Because of the many character classes used in
regular expressions, it is common to use a raw string here, unless string
interpolation is required.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">external factory RegExp(String source,
    {bool multiLine = false,
    bool caseSensitive = true,
    @Since(&quot;2.4&quot;) bool unicode = false,
    @Since(&quot;2.4&quot;) bool dotAll = false});</code></pre>
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